Best Trail within 1.5 hours of Denver

I am staying in Denver for the weekend. I need a place to ride one day close to Denver and a bike shop to rent a bike, preferably a 29er, preferably something that doesn't suck. Would you do CO Springs or is there somewhere closer to Denver that is better? I have Winter Park and Breck slated for later. (cross post from 29er forum) Hopefully something well marked, flowy swoopy singletrack, smooth and fun rather than uber technical. Thanks

Best place to rent a 29er is Golden Bike Shop. Adam should be able to hook you up with something that doesn't suck. We're riding Buffalo Creek Saturday morning. If your interested, send me a PM and we'll take it from there.